Refrigerating apparatus



Oct. 5, 1943. L. A. PHILIPP 2,330,916

BEFRIGERATING APPARATUS Original Fi' led Aug. 25, 1940 INVENTOR. LQMIEENCE q. PHIL/PP QTTOPN Y v Patented Got. 5, 1943 2,330,916 REFRIGERATING APPARATUS Lawrence A. Philipp, Detroit, Mlcln, assignor to Nash-Kelvinator Corporation,

Detroit, Mich, a

corporation of Maryland Original application August 23, 1940, Serial No.

353,924. Divided and this application July 21,

1941, Serial No. 403,353

1 Claim. (CI. 62-116) This invention relates to refrigerating apparatus, and more particularly to household refrigerators. v i

The present application is a divisionof my copending application, SerialNo. 353,924, filed Au,- gust 23, 1940, for Refrigerating apparatus.

One of the objects of my invention is to provide an improved cooling arrangement for a refrigerator cabinet wherein the liner ,is utilized as a heat absorbing surface throughout its area, and a secondary refrigerant cooling system is secured to said liner for absorbing heat from the liner in anew and improvedmanner. r

Another object of myinvention is to provide in the aforesaid secondary refrigerating system an ebullition initiator for initiating ebullition adjacent the lower portion of said system. Further objects and advantages of the, present;

invention will be apparent from the following description, reference-being had to the accompanying drawing wherein a preferred form of the present invention is clearly shown.

In the drawing:

Fig. 1 is a rear view of a refrigerated liner embodying features of my invention;

Fig. 2 is a view similar to Fig. 1 showing a modified form of refrigerated liner;

Fig. 3 is a view similar to Figs. 1 and 2 and showing a still further modification of refrigerated liner; and

Fig. 4 is a fragmentary view, partly in elevation and partly broken away, showing a form of ebullition initiator which is positioned in the secondary evaporating element.

Referring to the drawing, there is shown a metallic box-like shell, designated by the numeral 20, which is adapted to serve as an inner liner of a refrigerator cabinet, such as that shown in my copen'ding application, Serial No. 353,924, filed August 23, 1940, for Refrigerating apparatus. This shell forms the walls of a food storage compartment 22 and is surrounded by insulation For cooling the food storin the usual manner. age compartment, I have provided a secondary refrigerating system, designated in general by the numeral 24, and, as shown in Fig. 1, this includes an evaporating portion 26 secured to the rear wall of the liner only. The system also includes a condensing portion 28' which is secured to the rear wall of the liner at the upper portion thereof and has secured thereto a semi-circular shell 30 which is adapted to receive a primary cooling element not shown herein but may be one such as that shown and described in the aforementioned copending application. Since the the evaporator and after it shell 30 is secured to the condensing section 22 and system 24, preferably by welding, the primary cooling element may be in good thermal contact with the condensing portion 28 and is utilized for condensing evaporated refrigerant in the secondary system. .Evaporated refrigerant which is condensed by the refrigerating effect of the primary cooling element flows downwardly through vertical leg 32 to the lowermost part of the, evaporator 26 whence it flows upwardly in is vaporized it passes upwardly through vertical leg 34 to the upper portion of the condenser 28. Within the lower part of the evaporator 26, I have provided an ebullition initiator 36 to aid in promoting the ebullition of refrigerant promptly in the lower part of the evaporator 26. The secondary refrigerant evaporator 26 is secured to the rear wall of the liner, preferably by, a coating of "Hydrolene," however, any other bituminous cement may be used for that purpose. Preferably, the

heat exchange relation between the primary cooling element and the secondary condenser is such and the coating of Hydrolene between the evaporator 28 and the rear wall of the liner is such, that the secondary refrigerant evaporator functions to cool the food storage compartmentthrough the rear wall of the liner without the collection of frost upon the rear wall of the liner.

In Fig. 2 I have shown a modified form of secondary refrigerating system which includes evaporator structure 40 which is similar to the secondary refrigerant evaporator 26 except that it includes a portion 42 formed in serpentine relation and secured to the exterior surface of the bottom wall of the liner.

In Fig. 3 I have shown a secondary refrigerating system secured to the rear wall only of the liner 20 and this differs in that it has a serpentine coil section 50 adjacent an opening 52 in the rear wall of the liner 20. The opening 52 allows the insertion or withdrawal of a primary refrigerant evaporator (not shown) through the rear wall of the liner 20 as described in the above mentioned copending application.

Although only a preferred form of the invention has been illustrated, and that form described in detail, it will be apparent to those skilled in the art that various modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claim.

I claim:

Refrigerating apparatus comprising, a secondary refrigerant evaporator of circuitous formation arranged with one end thereof terminating above the other end thereof, a secondary condenser positioned above said evaporator, a conduit connecting the upper end of said circuitous evaporator in open communication with said condenser, a second conduit connecting the lower end of said circuitous evaporator in open communication with said condenser whereby said conduits establish open communication between the condenser and evaporator to cause operation in both at the same pressure, and means positioned in said circuitous evaporator between the upper and lower ends thereof to promote ebullition and direct the flow of refrigerant therein upwards toward the upper end of the circuitous evaporator and'the condenser.

LAWRENCE .A. PHILIPP. 

